Pavement



M- H. BENSON AND C. A. CARPENTER.

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% s 2 Fi 73:01. merit" PAVEMENT.

APPLICATION FILED JULY 28, I919.

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Patentea Feb. 22 1921.

UNITED STATES PATENT OFFICE.

MIRZA H. BENSON AND CHARLES CARPENTER, OF DES MOINES, IOWA.

Specification of Letters Patent.

Patented Feb. 22, 1921.

Application filed July 28, 1919. Serial No. 313,757.

T 0 all whom it nwy concern:

Be it known that we, Mmzx H. BENSON and CHARLES A. CARPENTER, citizens of the United States of America, and residents of Des Moines, Polk county, Iowa, have invented a new and useful Improvement in Pavements, of which the following is a specification.

The object of this invention is to provide an expansion joint for floors and street pavements susceptible of being laid in sections and forming a union with abutting portions of said floor or pavement.

A further object of this invention is to provide anexpansion joint susceptible of being laid in sections and assembled during the operation of laying in such manner that the same is in finished condition prior to the construct-ion of abutting portions of the pavement.

A further object of this invention is to provide an expansion. joint susceptible of being arranged in a pavement at angles other than right angles to the meglian line of said pavement and also susceptible of being laid in sections during or preliminaiy to the construction of abutting portions of pavement.

A further object of this invention is to provide an improved expansion joint for pavements including counterpart members having opposing concaved faces and a filler other than fluid between said counterpart members.

Our invention consists in the construction, arrangement and combination of elements hereinafter set forth, pointed out in our claims and illustrated by the accompanying drawing, in which- Figure 1 is a plan of a portion of street pavement showing our improved expansion joint laid at different angles relative to the median line thereof. Fig. 2 is a plan, Fig. 3 a side elevation and Fig. 4 an end elevation of one member employed in building 10, '11 designate pavement blocks made of any suitable material and corresponding if desired to the material of the pavement. For instance, in a concrete pavement the V blocks would be made of a similar \quality of concrete while in brick pavements the blocks would be made of vitrified clay or similar substance. The blocks 10, 11 are counterparts of each other and are here distinguished solely in respect of location. The blocks 10, 11 preferably are formed with longitudinal concaved grooves 12, 13 respectively and are assembled as shown in Fig. 5 wlth' said grooves opposing each other; the blocks 10 being laid in one row and the blocks 11 in a parallel row slightly spaced from the. blocks 10. A filler 14 of asphalt strips is mounted in the groove 12 and pro ects therefrom in such form as to be received in the groove 13 when blocks 11 are laid contiguous to the blocks 10. The spaces 15, 16 between the blocks 10 and 11 and above and below the concaved grooves 12, 13 therein may or may not be filled but when it is desired to fill said spaces asphalt strips may be employed duringthe opera-.

tion of assembling the blocks 11 contiguous to the blocks 10. The expansion joint blocks preferably are laid on oblique lines forming angles other than right angles to the median line of the pavement and the ends of said blocks preferably are beveled as shown to correspond to the inclination of the expansion joint in order that said ends of the blocks may interchangeably fit. and contact with curbing members 17, 18 employed on the street or roadway. We have shown in Fig. 1 one expansion joint indicated generally by the numeral 19 extending in a line obliquely across the roadway or pavement and also another expansion joint, indicated generally by the numeral 20 and extending in V form entirely across said roadway or pavement. :iEither arrangement of the expansion joint will provide for contact therewith of one wheel at a time of anv n s vehicle traversing the pavement longitudinally, thus avoiding the ordinary fault developed in pavements by the breaking down of edges thereof on opposite sides of the expansion joints, whichbreaking down pro duces ruts that are enlarged and accentuated by repeated contact in travel of vehicles thereon. Between the expansion joints the pavement may be laid of any suitable material and in sections of-desired size and no attempt is made to illustrate any distinction in material. v p

A pavement laid with expansion joints as illustrated and described herein presents a tread surface which is uniform and unbroken and the contact of'wheels with the blocks 10, 11 on oblique lines has little or no tendency to break/the edges of the blocks 3 to provide a suitable and. stable union be tween said blocks and said abutting portions of the pavement; Such construction revents heaving of the expansion joints relative to the major portions of the pavement and accumulates tendency to present a uniform unbroken tread surface for vehicles traveling thereon.

We claim as our invention- 1. In an expansive joint for pavements the combination of parallel rows of members, each of which members is formed with a concaved groove in one face and corrugations in the face opposite thereto, said rows of members being placed with the grooves ,in the members of one row opposite to the grooves in the members of theother row, a filler being assembled within 'the grooves, and pavement members on opposite sides of the parallel rows and bonded to the corrugated faces of the members, said grooved membersbeing adapted to be laid in the parallel rows extending diagonally of a roadway and formed with beveled abutting ends having their edges substantially in line with the roadway.

2. In an'expansion joint for pavements, a block formed with a groove in one face and corrugations in the face opposite thereto, a plurality of said blocks being adapted to be laid in parallel rows and spaced apart, and a filler formed of strips assembled within the grooves of said blocks.

3. In an expansion joint for pavements, a block formed with'beveled ends, a concaved groove in one face and corrugations in the face opposite thereto, a plurality of said blocks being adapted to be laid in parallel rows and spaced apart, and a filler assembled in other than fluid form within the grooves of said blocks, in combination with pavement members contiguous to and bonded with the corrugated faces of the blocks- 4. In an expansion joint for pavements, a block formed with a concaved groove in one face and corrugations in the face opposite thereto, a plurality of said blocks being adapted to be laid in parallel rows and spaced apart, and a filler assembled within the grooves of said blocks, in combination with pavement members contiguous to and bonded with the corrugated faces of the blocks.

Signed at Des Moines, in the county of Polk and State of Iowa, this 14th day of July, 1919. I

- MIRZA H. BENSON.

CHARLES A. CARPENTER. 

